On Wednesday there were reports that the pop princess and her on-again/off-again boyfriend John Mayer split up yet again. Later that night, the 29-year-old helped deliver her friend's baby in a living room. And on Thursday night, the "Roar" singer stepped out for the first time since the rumored split and had dinner with friends (including The Office's B.J. Novak!) at Jitlada in Hollywood. Her rumored engagement ring was quite noticeably absent -- further confirming the reports of their breakup.

These are the first pics of Katy since her breakup, and a photographer on the scene tells X17online exclusively:

"Katy looked very relaxed and didn't seem down at all about the split. She was enjoying the night with her friends and seemed happy."

The brunette singers began dating in the summer of 2012, split briefly last March, but then reconciled. The duo seemed to be going strong since getting back together, and Katy was even spotted what appeared to be an engagement ring on Valentine's Day. There has been no official statement from either camp on the break up.

If the duo did break up -- it seems like Katy is still roaring. Can't keep a good girl down!